Cal. Code Regs. Tit. 8, § 2390.81 - Circuit Breakers
(a)
Circuit breakers shall clearly indicate whether they are in the open "off" or
closed "on" position.
(b) Where
circuit breaker handles on switchboards or in panelboards are operated
vertically rather than rotationally or horizontally, the up position of the
handle shall be the "on" position.
(c) Circuit Breakers Used as Switches.
Where used as switches in 120-volt and 277-volt fluorescent lighting circuits, circuit breakers shall be listed and shall be marked "SWD."
(d)
Applications.
(1) A circuit breaker with a
straight voltage rating, such as 240 V or 480 V, shall only be installed in a
circuit in which the nominal voltage between any two conductors does not exceed
the circuit breaker's voltage rating. A two-pole circuit breaker shall not be
used for protecting a 3-phase, corner-grounded delta circuit unless the circuit
breaker is marked 1[PHI] - 3[PHI] to indicate such suitability.
(2) A circuit breaker with a slash rating,
such as 120/240 V or 480Y/277 V, shall only be installed in a circuit where the
nominal voltage of any conductor to ground does not exceed the lower of the two
values of the circuit breaker's voltage rating and the nominal voltage between
any two conductors does not exceed the higher value of the circuit breaker's
voltage rating.
Notes
2. Amendment of section heading, section and NOTE filed 5-5-2008; operative 5-5-2008. Submitted to OAL for printing only pursuant to Labor Code 142.3(a)(3) (Register 2008, No. 19).
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
2. Amendment of section heading, section and Note filed 5-5-2008; operative 5-5-2008. Submitted to OAL for printing only pursuant to Labor Code 142.3(a)(3) (Register 2008, No. 19).
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